Ozavba



l. A. CZAVRA.

AUTOMATIC GUN.

' APPLICATIONFILEDSEPTJE.I918.

Jemima Nov. 11, 1919.

2 BEETS-SHE? l.

INVENTOR Wit/1630111:

ATTORNEYS UNITED STATES PATENT OFFICE.

1 1T0 all inflame; may concern:

' citizen of Russi 'that'l, IGNATI A. CZAVRA, a

Be it Z known the countx ind State of .t i f t 'n newand usetul t 9% Sin$11 .y i tlfi ns; d; I

T an. nd

erence being My inventlon relates to automatic guns light and which 0 trbe 0 met withiiut 1e acgivltiesof the operate urther' olinect iof theinvention is tofjpfovidfe an automatic gun whlch can beCtfil'lfitf'ifPOn the breast of the operatorfwitheut theiuseof his handsand w iich canjlpe securely locked against aficidental' discharge whennot n use. '1 0 these and other ends the invention consists in certainimprovements and coi'nbinations of parts all as will be hel'einaffer'more" fully descrlbedfthe noreljeatnies Being pointed "out in the claimsat theme cf the pe mechanism,"

tion.

In e r win s Figure 1 is'a'front elevation of a gon constructedaccording to myflinvention with the coverremovdto show the underlyingFig.9 isfa emits; View with parts broken 1 awe and showspertsin otherrelations.

Fig. 3 is an enlarged central vertical secnon taken lis e -e 0 Fig. 4,

I orator.

' Fig. 4? a A elevation of the device with the cover jn positionthereon, v

Fig. 5fis a'section on the line i 5" of Fig. 3, and

Fig. 6 is a sectional detail view, showing the mounting of the revolvingcylinder and its bearings.

Similar reference characters in the several figures indicate the s'ameparts. Z 7

My gun com gis'es aeupport 1 111. the form of ai meta lrc' pine to becarried a' "inst'thebreast of the tipat thesides of the plate 1, seat 2,are flexible extensions 3 and}, to which are secured straps 5, which mayhe erator by means of buckles 6. Secured to th top of the plate 1arestraips 7 which pass residing at Rochester in 1611' is adapted 7'rbitia'ifiiroznvna, or nocnnsrnn, NEW roux.

Specification of Letters Patent. Pate ted Nov. 1 1, 1919. Applicationflled septeinber 1a, 1913. swarm. 254,511.

over the shoulders of the operator and engage with the buckles 8. Bythis construction, the plate 1. upon which the mechanism *issupported,may be securely fastened to the body of the o erator and carried withuseofhis ands, or interfering with the free movement thereof. Mounted upon:thejp'late 1 'slightly above the center thereof is a' bearing plate 9secured to the plate 1 by screws 9 or other suitable means. The plate 9is cylindrical in form and has a central aperture 10 extending atsubstanrig t angles to the supporting plate tiall y 1. he bearing plate9 is also provided with a horizonta ly extending opening 11, whichintercepts the aperture 10. A cartrldge carrier or cylinder 12 having aplurallty of chambers 13 for cartridges, and a diameter substantiallyequal to the diameter of the bearing plate is mounted to revolve incontact with the bearin plate 9. The cylinder 12 is adapted to be1nscrtcd and removed from the instrument as a unit, and the chambers 13are arranged concentrically near its periphery -8 chambers being shownin the present instance. The cyllnder has a central aperture 14.extending therethrongh. 'Mounted in the :1 )erture 14 is a bearing bolt15 having an cniarged end 16 and a threaded outer end 17 Cooperat ingwith the threaded outer end 17 is a nut "18 which is adapted to liewithin a counter bored part of the cylinder and engages a shoulderformed in the bottom thereof.

The cylinder is adapted to rotate freely on the bolt 15', and thecylinder and bolt are nserted as aunit. the enlarged head 16 bem seatedin the central aperture in the plate 9. "Thepart 16 has an apertarget)th'erethrough adapted to receive a lo'cklng pin 21, which passes throughthe y o eni ng 11 in the bearing plate and through 1) 'e opening 20 inthe bolt 15 and securely *locks the bolt 15 and the cylinder to thebearing plate 9. In order to secure proper hlinement of the openings 11and 20, the

{head 16 of the bolt 15 may be provided with afg'roove to 'cotipcratewith a projecting ling formed in the side of the a f'p3n321 maybe'provided wit a finger piece 23in facilitate insertion and removalthereerture 10. The

shine a resilient locking arm 24 pivoted p to the plate 1 and having adetent 25 cotight'ly buckled about the body of the opw '1) ate 1 may beemployed to lock the pin 21 o erating with the apertures 25 in the mposition. The outer end of the bolt 15 may be provided with a conicalshaped opening or aperture 2? adapted to oofiperate with a oenteri pin25" on a sheet metal cover 26 hin at 27 to the supporting plate 1 andadapted to he looks in the position shown in Figs. 3 and 4 by lockingdevices 28. A discharge barrel 29 is also carried bythe plate 26, andwhen the plate 26 is in the operative positionshown in Fig. 3, thebarrel 29 is broughtfinto pro er alines ment with that chamber of. thecy 'nder in firing position by means of the centering in 25. P Means areprovided for rotating the cylinder 12 to successiveljr' bringthechambers carrying the cartridges into firing position. Said meansoomprisesa ratchet wheel 29 comprising a Iglflurality of teeth formedupon the sides of t e base of the cylinder 12 and integral therewith.The number of teeth 29 corresponds to the number .of chambers in thecylinder. Cooperating with the teeth 29 of the ratchet w eel is a starwheel 30. Formed integral with or riveted to the face of the star wheel30 is a ratchet wheel 31, and the combined star wheel and ratchet wheelare pivoted upon the face of the plate 1. Pivoted concentrically withthe star wheel 30 is a bell crank lever 32 having a pawl 33 pivoted onits shorter arm 34. he pawl 33 is adapted to successively engage theteeth of the ratchet wheel "31, as the lever is vibrated. A spring 35 onthe bell crank lever cooperates with the pawl to resiliently hold itengaged with the teeth of the ratchet wheel. A spring 36 secured to thelate 1 cooperates with the longer arm of t e bell crank lever andnormally holds the bell crank lever in the retracted sition shown inFig. 1 of the drawings. 0 prevent free movement of the wheel 30 and toprevent its being moved in a reverse direction by the pawl 33, a detentpawl 37 is [pivoted to the plate 1 and cofiperates with t ratchet wheel31. A spring 38 resiliently holds the pawl 37 in angel out with theratchet wheel. Stops 39 an 40 roject from the face of the plate 1 and.cooperate with the lever 32 to limit its motion in opposite directions.The lever 32 is o erated by means of a flexible cord 41 secure to theend of the Ion r arm of the lever and. passing over anti-fictionguiderollers 42, 43 and 44, from the latter of which it extendsupwardly, and at its upper extremity is provided with a wrist band 45adapted to be secured to the arm of the operator. The cord 41 above theguide roller 44 has a lock bolt 46 connected in the cord and guided in aplate 47 secured to the member 4. A looking arm 48 is ivoted to themember47 and coiiperates'wit the bolt 46 to prevent actuation thereofwhile the instrument is not in use. It will he noted that this lockingmeans is adapted to efi'ectively prevent operation of e teeth of the theparts while the gun is out of use. By a :mo vementof the arm, the bellcrank lever 32 is vibrated to rotate the cylinder to successively bringthe cartridges contained therein into firing position. he arms of thestar wheel .30 also coiiperate with a firing hammer 49 which actuatesdevices for firing cartridges as the'y'are successively brought into thefiring. position. The hammer 49 is pivoted at 5Q. to the supportingplate 1 and 1s provided with a spring 51 resiliently holding thehammerin the position shown in Fig. 1. The spring 51 also actuates the ham merto discharge the gun. The hammer 49 has a depending arm 52 in the pathof the arms of the star. wheel 30. When the star wheel 30fis rotated,these arms successively engage the arm 52 and retract the hammer to theosition shown in Fig. 2. A slight forwar movement ofthe arms 30 from theposition shown in said figure releases the hammer whiohis moved todischarge the 1gun by the spring 51. Depending from the ammer 49adjacent its endis a beveled or wedge shaped lug or projection 53adapted to cooperate with a slide 54 which carries the firing pin 55. Byreferences to Figs. 3 and 6 it will be noted that the slide 54 isbeveled to coiiperate with. the lug 53 and a spring 55 surrounds thefiring pin and servesto hold the same in retracted position, asshown inFig. 6. The slide 54 has a bearing in acnt out portion 56 in the upperside of the bearing plate 9.

Means are provided for locking the hammer in the position shown in Fig.1, while the un is out of use. This means com rises a lo king pin 57slidably mounted in a. ousing 58 secured to the supporting plate 1. Aspring 59 serves to pro ect the bolt to locking position. The end of thebolt 57 is provided with an eye to which a flexible cord 60 is secured.and which passes over a plurality of roller guide bearings 61, and atits outer end is provided with a wrist band 62 which may be secured tothe arm of the o erator. If desired, means may be provlded such as shownat 63 for adjusting the lengths of the cords 41 and 60. This meanscomprises screws 64 secured to the cords and connected with threadedopenings at the ends of a coupling member 65.

It will be noted that the cover 26 which houses the parts iscomparatively shallow and beveled at its outer edges, making theinstrument, very compact.

The operation of the device is as follows: The cylinder 12 having itschambers 13 filled with loaded cartridges, together with the bearin bolt15, isinserted, the head 16 of the be t entering the opening 10' in thepath 9. The chambers of the. cylinders may be counterbored as indicatedin the drawings, so that the cartridges may lie flush with the innersurface of t e cylinder. The pin 21 is then inserted to lock the bolt 15and cylinder to the bearing plate 9. The cover 26 is now moved to closedposition, the pin 24 operating to properly aline the barrel with thatchamber of the cylinder which is in firing position. In order to preventa too free rotation of the cylinder, a spring 66 may be secured to thecover 26 in position to frictionally engage the cylinder. The operatornow moves the arm to which the hand 62 is attached to withdraw the bolt57 from looking position. With the locking member 48 in releasedposition, the operator now moves his arm to pull the cord 41, to swingthe lever 32 against the tension of its spring from engagement with thestop 39, to engagement with the stop 40 and the ratchet and star wheelsforward one tooth. During this movement, the star wheel first engagesand rotates the cylinder forwardly, and after a slight movement of thecylinder, engages the projection 52 of the hammer, raising the same asthe cylinder is moved fOIWVtlI'd. Simultaneously with the. .alinement ofthe'succeedin chamber with the barrel and firing in, the star wheel,passes the lug 52 and t a spring 51 swings the hammer intoengagementwith the slide 54, and the alined cartridge is discharged. Thebands @5 and 62 may be attached to the arms above the elbows, as only aslight movement of the cords is required to operate the un, thus leavingthe forearms and hands Having described my invention, what I claim anddesire to secure by Letters Patent is:

1. In an automatic gun, the combination of a plate adapted to be securedto the body of the operator, a cartrid cylinder supported thereon torevolve 3. out an axis substantially erpendicular to the face of theplate, a firmg hammer ivoted to said late or movement substantiallyparallel t erewith, and a revoluble star wheel adapted to rotate thecylinder and simultaneously re tract said hammer.

2. In an' automatic n, the combination of a support, a cartri gecylinder thereon revoluble about an axis substantially perpendicularthereto, a firing hammer pivoted to said support for movementsubstantially parallel therewith, a ratchet wheel on said cylinder, anda revoluble star wheel for retracting said hammer and adapted to engagethe teeth of said ratchet wheel to rotate the same.

3. In an automatic gun, the combination of a support, a cartridgecylinder revolubly supported thereon,.a firin hammer pivoted to saidsupport, a revolu le star wheel for rotating said cylinder andretracting said hammer, and pawl and ratchet devices for rotating saidstar wheel.

4. In an automatic gun, the combination of a support, a cartridgecylinder revolublv supported thereon, a firing hauuner pivoted to saidsupport, a revoluble star wheel for rotating said c linder and retractinsaid hammer, a rate at on said star whedl, and a pawl ooiiperating withsaid ratchet for imparting a step by step movement to said star wheel.

5. In an automatic the combination of a support, a cartri ge cylinderthereon revoluble about an axis substantially perpendicular thereto, afiring hammer pivoted to said' support for movement substantiallyparallel thereto, means for revolving said cylinder and simultaneouslyretracting said hammer. and means for locking said hammer againstactuation.

(3. In an automatic gun, the combination of a supporting plate, abearing plate mounted thereon, a revoluble cylinder detachably mountedon said bearin plate. a slide having a beveled surface an a firing pinmounted in a recess in said bearing plate, a hammer pivoted to saidsupporting platq and having a beveled projection for engaging thebeveled surface on said slide for actuating the slide, and meansforactuating said hammer and rotating the cylinder.

7., In an automatic'gun, the combination of a supporting plate, meansfor securing said )late to the body ofthe operator, a carrier or aplurality of cartridges supported on said plate, a firin pin, a hammerpivoted to said plate and a apted to cooperate with said firing pin, andmeans adapted to be secured to the arm of the operator for moving saidcarrier to successively move the cartrid es into alinement with saidfiring pin an simultaneously actuate the hammer.

8. In an automatic gun, the combination of a supporting plate, meansfor"securing said plate to the body of the operator, at carrier for aplurality of cartridges supported on said plate, a, firing pin, a starwheel for moving said carrier to move the cartridges successively intoalinement with said firin pin and actuate the firing pin, and pawl anratchet devices for actuating the star wheel.

9. In an automatic gun, the combination of a supporting plate, means forsecuring said plate to the body of the operator, a carrier for aplurality of cartridges supported on said plate, a firing pin, a coverplate on said supporting plate, a dischar e barrel on said cover platein alinement wit said firing pin, and means for moving said carrier tosuccessively bring a cartridge into alincment with said barrel.

10. In an automatic gun, the combination of a supporting plate, meansfor securing said plate to the body of the operator, a cyl inder havinga plurality of chambers revolubly mounted on said plate, a firing pin inalincment with one of the chambers of said cylinder, a cover platehinged to said supporting plate, a discharge barrel on said cover plate.means for alining said barrel with that chamber of the cylinder inalincment with the firing pin, and means for rotating the cylinder tosuccessively bring its chambers into alinement with the firing 11. In anautomatic gun, the combination of a support adapted to be secured to thebody of the operator, a cartridge container revolubly mounted on saidsupport with an axis substantially normal to the latter, containerrevolving means on said support, a hammer on said support, saidrevolving means'and hammer being disposed parallel with said support formovement in the plane of the latter, and actuatirn: means for saidrevolving means and hammer.

12. In an automatic gun. the combinatitm of a support adapted to besecured to the. body of the operator, a bearing on said support, acartridge container reroluble on said bearing about an axis normal tosaid sup port, and actuating means on said support arranged formovement. parallel with the, latter for revolving said container anddischarging said cartridges.

13. In an automatic gun, the combination of a support adapted to be,secured to the body of the operator. a second support parallel with thefirst. and spaced therefrom. a

revoluble cartridge carrier between said supports, carrier revolvingmeans and tiring means between said supports and movable parallel withthe latter, and actuating means under control of the operator for saidrevolving: means and firing means.

14. In an automatic gun, the combination of a support adapted to besecured to the body of the operator, a cartridge container revolublymounted on said support about an axis substantially normal to thelatter, a star wheel revoluble in the plane of said sup port forrevolving said container. a hammer movable in the plane of the supportfor firing said cartridges, and actuating means under control of theoperator for revolving said star wheel and moving said hammer.

15. In an automatic gun, the combination of a support adapted to besecured to the bod) of the operator, a cartridge container revolublymounted on said support about an axis substantially normal to thelatter. a star wheel rerolulile in the plane of said support forrevolving said container. a hammer movable in the plane of the supportfor firing said cartridges, and actuating means under control of theoperator comprising a pawl and ratchet for revolving said star wheel andmoving said hammer,

IGNATI A. (ZAVH.\.

